The BGS Lexicon of Named Rock Units — Result Details

Hollybush Limestone

Computer Code: HHLS Preferred Map Code: notEntered
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: A pale to dark grey, argillaceous, shelly, bioclastic, limestone, interpreted to be of marine origin, generally with a massive lower portion and a thinly bedded upper sequence.
Definition of Lower Boundary: Generally changes from a thin coal or seatrocks overlain by a marine mudstone of the Craigenglen Marine Band belonging to the Lawmuir Formation.
Definition of Upper Boundary: Generally succeeded by a marine mudstone of the Craigenglen Marine Band, belonging to Lawmuir Formation, which is overlain by sandy non-marine strata.
Thickness: Up to 5.0 m thick in the Paisley and Glasgow districts, elsewhere represented by the Craigenglen Beds.
Geographical Limits: The Paisley and Glasgow area of the Midland Valley of Scotland.
Parent Unit: Lawmuir Formation (LWM)
Previous Name(s): Productus Giganteus Limestone (PGLS)
Craigburn Limestone [Obsolete Name And Code: Use HHLS] (CNLS)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  The Lawmuir Borehole, BGS reg. no NS57SW/162, measured as 4.14 m thickness of limestone and interbedded calcareous mudstone, from a base depth of 40.78m. Hollybush is in the Barrhead area SW of Glasgow. 
Reference(s):
Hall, I H S, Browne, M A E and Forsyth, I H. 1998. Geology of the Glasgow district. Memoir of the British Geological Survey, Sheet 30E (Scotland). 
Forsyth, I H, Hall, I H S and McMillan, A A. 1996. Geology of the Aidrie district. Memoir of the British Geological Survey, Sheet 31W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S023 S030 S030